Charles perley



UNITED STATES PATENT OFFICE.

CHARLES PERLEY, OF NEW YORK, N. Y.

TRIPPINGr-BLOCK FOR BOAT-DAVITS.

Specification of Letters Patent No. 21,979, dated November 2, 1858.

To all whom it may concern:

Be it known that I, CHARLES PERLEY, of the city and State of New York, have invented, made, and applied to use a certain new and useful Improvement in Blocks, which I term the Tripping-Blocks; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawing, making part of this specification, wherein- Figure 1 is a vertical section of my said block, and Fig. 2 is a side view of the same.

Similar marks of reference denote the same parts.

In lowering boats from vessels, it is exceedingly diificult to detach both ends simultaneously from the davit blocks, and if one end becomes detached and not the other the boat is swamped, because the weight hanging on the one end renders the unhooking of the ordinary chain impossible. Thus very many valuable lives have been lost. Besides this it is often important to disengage a particular sail instantaneously, or perform similar operations where considerable weight is suspended and has to be disconnected from the rope or chain by which it has been moved or sustained.

The nature of my said invention consists in a block or its equivalent attached to the rope or chain which sustains or regulates the movements of the boat or other article, and provided with a lug that receives a link on the article to be sustained or on a rope or chain connected thereto, and said block is provided with a drop so fitted that the link or its equivalent is sustained in the said block and that when said drop is raised by a very slight pull the block will be effectively and instantly disconnected from the said link or article connected thereto, thus providing a means by which the oiiicer in charge can disconnect a boat at the right instant to prevent swamping, or a sail can be dropped, or any other weight that is raised or controlled by a` chain or rope can be disconnected from the same at the right time and with great facility.

In the drawing a, a, are cheek pieces formed with or connected to the eye b, and to this eye the rope or chain c, is attached, and where the apparatus is to be used with a double or treble fall as with a boat davit, the sheaves cl, d, are provided in the shell of the block, as seen in Fig. 2, to pass the rope and increase the purchase.

e, is a link ring or its equivalent to which the article to be sustained and disconnected is attached, either directly or through the medium of a rope or chain. This link is entered up between the cheeks a, a, in a mortise provided for that purpose and placed over the lug f that projects from one of the cheek pieces, and then the blocking piece g drops or is dropped into place, which coming against the side of the link e, prevents it sliding oif the lug This blocking piece g is attached by a center pin l, and moves between the said cheek pieces a, a, and is provided with a line or small rope 7L passing through eyes 2, 2, and also with a tongue 3, through which a pin 4 may be inserted to prevent any accidental disconnection. It will now be apparent that the otlicer in charge of a boat in lowering the saine ta res the lines (71., la) from each davit block, and by simultaneously pulling thereon disconnects both ends of the boat at the right time to prevent the same swamping. Where this device is used for other purposes the lead of the line h, may be regulated according to circumstances.

It will be apparent that the blocking piece g might be provided with a handle to lift the same and allow the link e, to slide off the lug f, although I prefer the rope 7L. It will also be apparent that the link e, might be made double instead of single and the blocking piece g inserted between the parts thereof or otherwise varied and act in connection with said blocking piece substantially as before enumerated.

I do not claim a link and lug as the same have heretofore been used in cable Stoppers, but in this instance the apparat-us was a fixture and not adapted to a hoisting or lowering device, and in applying the same to the present purposes new and very useful results are attained.

IVhat I claim as my invention and desire to secure by Letters Patent is- The tripping or disconnecting block constructed substantially as specified, and applied to davit blocks for boats, or to other purposes as set forth.

In witness whereof I have hereunto set my signature this fourth day of October 1858.

CHARLES PERLEY.

Witnesses LEMUEL W'. SERRELL, THOMAS Gr. HAROLD. 

